Extreme humidity — not just extreme temperatures — will make headlines over the next week. Humidity levels will surge across 40 states and southern Canada, bringing tropical rainforest-like conditions, especially next week

Local Outlook:

(via Weather Channel):

• In general, we’re forecasting highs in the 90s to spread over much of the country east of the Rockies, except for the far northern tier.
• Parts of the Great Lakes and interior Northeast have yet to reach 90 so far this year, according to the Southeast Regional Climate Center.
• A few locations could approach or top 100 degrees during the heat wave, including Denver, which only happens twice a year on average. New York City and Philadelphia could also flirt with the century mark during the peak of the heat wave next week.
• New York’s Central Park hasn’t reached 100 degrees since July 18, 2012, according to the National Weather Service.